National Techincal Services Non-destructive Testing Positive Material Identification

Niton™ XL2 XRF Analyzer—one of the scanners used by National Techincal Services for PMI

Fast and Reliable

National Techincal Services’s positive material identification (PMI) provides alloy chemistry and grade ID information in seconds using a hand-held scanner.

PMI is also commonly used to ensure:

  • the composition of the parent material is correct
  • the correct filler material was used during equipment repair.

On-the-Spot Results

With PMI there is:

  • no transporting material
  • no altering material
  • no damaging material.

Using hand-held scanners means we can:

  • minimize costs associated with extensive lab analyses, especially when high volumes of testing are required
  • conduct on-location testing for materials that are difficult to transport to the lab
  • facilitate material testing at the manufacturing point
  • assign a quality and production pass/fail status immediately or make required adjustments
  • trouble-shoot potential problems before failures occur.

Versatile and Comprehensive

Our scanners can be used to inspect virtually any equipment, including :

  • finished welds and weld beads
  • bolts, rivets, and other fasteners
  • valves and flanges
  • complete reaction vessels.

They are engineered for in-service inspection of systems with temperatures in excess of 800°F (426°C).

A Variety of Scanners

National Techincal Services has a variety of scanners available for use, including:

  • Niton™ XL2 XRF Analyzer—for standard optical PMI
  • Oxford Instruments™ PMI Master Arc Probe—ideal determining a material’s carbon content.

Broad Applications

National Techincal Services uses scanners with an extensive library of alloy grades. Families of alloys that can be accurately identified and analyzed include:

  • stainless steels
  • Cr-Mo steels including, vanadium and tungsten stabilized versions
  • low alloy steel
  • tool steels
  • nickel, copper, titanium, and aluminum alloys
  • exotics, such as zirconium and tantalum alloys.